Electric motor casing



FIG. 1 is a perspective view of an electric motor casing showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a first side view thereof; and,

FIG. 4 is a second side view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an electric motor casing, as shown and described. 